Fountain pen



B. W. HANLE Feb. 2l, 1939.

`FOUNTAIN PEN Filed May 23, 1936 7 @E w ,A f u Kfm ATTORN EYS NIK/l Patented Feb. 21, 1939 y y 2 148,236

UNITED STATES PATENToFFIcE 2,148,236

FOUNTAIN PEN lBenjamin W. Hanle, Elizabeth, N. J.,l assigner toA Eagle Pencil Company, a corporation of Delaware e Appiimmonl May 23, 1936;.,sela1Na 'La'z-s i s Claims. (ci. 12M?) My present invention relates to fountainpens `operation to turn the Vrod I5 within the tight of the 'vacuum plunger type, gland structure 20-2I or to turn the plunger P, l Among the objects ofthe invention are to prohereinafter described, within the pen. barrel, and

uum producing plunger, of fewer parts and, less rotation are avoided. t cost than conventional structures, but of en. An important feature ofthe present invention hanced effectiveness. i is the construction of the plunger P and its asso- In the accompanying drawing,l in which is ciation with the plunger rod l5. 'Ihe rod has shown one`^ofvarious possible embodimentsrof an enlargement or head 25 and the plunger the several features ofthe invention, proper is a unitary piece of rubber which com- Fig. 1 is la view of :the pen in longitudinal pletely. enclosessaid head, as shown. AIn a precross-sectio showing the same in the process of terred embodiment, the head comprises a cupped. reilllln'gf' Fig. 2-is"a vViews'iinilarfto Fig.' l shovvizigwthe through the ymiddle of which extends `the re-` Vperilsubstantially at the instangthat it` has bei duced tip 2l of the plunger rod, which ls upset come completely/'ill d Fig. 3 is aperspect'iveview of the plunger con- The rubber plunger member in a prefer-redemstruction, devicfof the operating c p, y odiment, is a unitary hollow ilexlble approxij Fig. 41s a fraginentary` perspective view on a mately conical or hemisphericalpiece including larger scale of the lower end of the' plunger, an imperforate disk base 26 and a generally coni Fig is a perspective view of the rubber cal though somewhat convex side Wall 28 to applunger member also on a larger scale, and proximate a hemisphere, with a central opening g 6 is a fragmentary view in transverse 29 at its apex or pole a opening is prefercrcssfsection and on a larger scale of an alterably considerably smaller than that o1' the head native embodiment of plunger 25 and the hollow rubber member is thus readll o disks 2| some of rubber and some of felt are such plungers and the consequent reduction in intothespacehetweentheheadllwhichactsas aeoreandthebarrelwallasshowninl'lg.l,to ailord a particularly elective packing for exthe air therebelow.tobubbleup from un- 5 derthcinkinthewell. Thevscuumthuscreated i'n the barrel. P, is immediately theplungerpassestheshoulderihdenning thebarrelenlargement il. The inknowrushesinfromthewelitoililthebarrel. 'lhereiwnfthecapilisthreadedintoplace While itispreferredtoprovide the plunger with agenerallyh calpieceofresilicntmbber,itiswithinthescopeof the invention tomoldthesottnlbber erPinthegeneral formshowninlligoabouttheheadandthe lower end of rod'll.

thus be seen article in which the thatthereishereindessveralfeaturel the scope contained in the above the accom drawas illustrative and not in intended tha description or shown in inl shall be interpreted a limiting sense.

Having thus described my invention. what I elaimasnew anddesiretosecurebyLettersPatent of the United States is:

l. A fonmtain pen of the self-ailing vacuum which includes a barrel having an near the section end and a phmger rod therethrough: in which the plunger rod has a rigid cupped head at its lower end and comprises an approximately hemihollow flexible upper unit, with an apte the plunger A the lowerface ot the 2. A fountain pen of the self-filling vacuum plunger type, which includes a enlargement in its bore near the section end and a plunger rod therethrough: the combination therewith of a rigid head at the lower end of said rod and a iiexible rubber plunger having a peripheral flange portion and completely enclosing said head. the latter serving as a core for limiting the major nexure to the peripheral portion thereabout.

3. A fountain pen of the self-filling vacuum plunger type. which includes a barrel having an enlargement in its bore near the section end and a plunger rod therethrough sai cupped rigid had at an all-rubber plunger completely enclosing said head, encircling the rod above the head and having the central portion of its lower end extending substantially in a plane across the concavity of head.

4. A plunger for a vacuum ountain pen comprislng a plunger rod having a head at its lower end, in periphery. and a soft rubber plunger unit and enclosing said head, through which the rod extends the lower face of said plunger unit enlaging the face of said head and having a unitary peripheral enlargement thereahout.

5. A plunger for vacuum fountain pen comprising a rod. a generally conical head rigidly seof the rod with its convexity upward. a flexible rubber plunger member completely enclosing said head and presenting an conical upper face about the rod and a circular lower face of diameter substantially larger than that of said head, said lower face having a peripheral enlargement.

6. A fountain pen comprising a barrel, a plunger rod in said barrel, and a substantially conical plunger of resilient material'connected to the lower end of said rod, and having a peripheral flange at the hase thereof in iluid sealing engagement with the inner periphery of said barrel.

BENJAMIN W. HANLE.

barrel having an 

